The Machine in Your Pocket

A Computer in Every Pocket

There are roughly 6.9 billion smartphones in the world. Not in the hands of the wealthy. In the hands of almost everyone. A farmer in Kenya uses one to check crop prices. A teenager in Brazil uses one to learn English. A grandmother in Vietnam uses one to video-call her grandchildren on the other side of the world.

The device in your pocket is more powerful than the computers NASA used to land on the moon. It costs a fraction of what a basic desktop computer cost 20 years ago. And the reason it exists — the reason it's affordable, reliable, and available to billions — is the stock market.

That's not an exaggeration. It's the mechanism.

How Capital Markets Built the Modern World

Apple didn't build the iPhone with profits from selling Macs. It raised capital — first through private investors, then through its IPO in 1980, then through decades of reinvestment fuelled by public market capital. Investors bought shares. Apple used that money to hire engineers, build factories, fund research, and develop products. The stock market was the engine.

The same story plays out across almost every industry that has materially improved everyday life.

Flying used to be for the rich. In the 1950s, a return flight from London to New York cost the equivalent of several thousand pounds in today's money. It was genuinely a luxury. Today, you can fly the same route for a few hundred quid. Budget airlines like Ryanair and easyJet — both publicly listed companies — used capital markets to buy fleets, build routes, and drive down costs through scale. The stock market didn't just make their shareholders wealthier. It made flying accessible to hundreds of millions of people who could never have afforded it before.

Medicine used to kill more people than it saved. The pharmaceutical companies that developed vaccines, antibiotics, cancer treatments, and insulin pumps were funded by capital markets. Pfizer, AstraZeneca, GSK — these aren't small labs run by benevolent scientists. They're enormous publicly traded companies that raise billions through equity markets to fund research that takes decades and fails more often than it succeeds. The stock market absorbs that risk. The public benefits from the breakthroughs.

Information used to be locked behind institutions. Google's mission to "organise the world's information" was funded by its 2004 IPO. The capital it raised allowed it to build the infrastructure that now gives a child in a rural school access to more information than the world's best universities had 50 years ago. For free.

The Trickle That Became a Flood

"Trickle-down economics" is a phrase that gets people's backs up — and understandably so. The idea that making rich people richer automatically benefits everyone else is a simplification that ignores real inequality, wage stagnation, and the concentration of wealth at the top.

But there's a version of the story that is genuinely true, and it has nothing to do with tax cuts for billionaires.

When capital flows into companies through the stock market, those companies use it to build things. They hire people. They develop products. They compete with each other, which drives prices down and quality up. Over time, what starts as a luxury for the few becomes affordable for the many.

Air conditioning. Washing machines. Television. The internet. Smartphones. Each one followed the same arc — expensive and exclusive at first, then mass-produced and accessible within a generation. The mechanism that makes this happen is investment, and the stock market is the largest, most efficient system ever created for channelling investment into productive enterprise.

This isn't trickle-down in the political sense. It's something more like capital-funded innovation at scale. The benefits don't trickle. Over time, they flood.

The Numbers Are Staggering

In 1981, roughly 42% of the world's population lived in extreme poverty. By 2024, that figure had fallen below 9%. In a single generation, billions of people moved out of poverty.

That didn't happen by accident. It happened because capital was deployed at enormous scale into businesses that created jobs, built infrastructure, and produced goods that became cheaper year after year. The stock market was at the centre of that process — connecting people with money to invest with businesses that needed money to grow.

Global life expectancy has increased from around 52 years in 1960 to over 73 years today. Child mortality has fallen by more than 60% since 1990. Literacy rates have risen from 42% in 1960 to over 87% now. None of these improvements happened because of a single policy or a single company. They happened because of sustained investment in innovation, infrastructure, and enterprise — most of it channelled through capital markets.

It's Not Perfect

None of this means the system is without flaws. Wealth inequality has grown sharply in many developed countries. The gains from stock market growth have disproportionately benefited those who already had capital to invest. Executive pay has exploded while median wages have stagnated. Climate change has been accelerated by the same industrial growth that lifted living standards.

These are real problems. They deserve real attention.

But the answer to "has the stock market made the world better?" is an overwhelming yes — even for people who have never bought a share. The products they use, the jobs they work, the medical treatments they receive, the flights they take, and the phones in their pockets all exist because someone, somewhere, invested capital into a business and took a risk.

And the Next Chapter Is Already Being Written

The pattern is repeating right now with artificial intelligence. Microsoft has invested billions into OpenAI. Google, Amazon, and Meta are pouring tens of billions into AI infrastructure. Nvidia — the company making the chips that power it all — became one of the most valuable companies on earth almost overnight.

Today, AI feels like a tool for tech companies and early adopters. But so did the internet in 1995. So did smartphones in 2007. The trajectory is always the same — expensive and exclusive first, then everywhere.

AI is already being used to detect cancers earlier than human doctors can. It's translating languages in real time, making education more accessible, and helping scientists model new drugs in weeks instead of years. Within a generation, these tools will likely be as normal as search engines are today — and just as taken for granted.

And just like every wave before it, the capital funding this revolution is flowing through the stock market. When you own a global index fund, you already own a slice of every major company building AI — without having to guess which one will win.

Why This Matters for Everyday Investors

When you invest in a global index fund, you're not just trying to grow your own wealth. You're participating in the same mechanism that built the modern world. Your capital — however modest — flows into companies that employ people, develop products, and compete to make things better and cheaper.

That's not a feel-good story bolted onto an investment brochure. It's the actual mechanics of how capital markets work. The returns you earn as an investor are your share of the value those companies create. And the products and services they create benefit everyone — investors and non-investors alike.

The stock market isn't perfect. But it's the most powerful engine for improving material living standards that humans have ever invented. The phone in your pocket is the proof.

Further Reading

• Rosling, H. (2018). Factfulness. Sceptre. A data-driven look at why the world is better than most people think.
• McCloskey, D. (2010). Bourgeois Dignity: Why Economics Can't Explain the Modern World. University of Chicago Press. On why innovation and capital, not just resources, created modern prosperity.
• Pinker, S. (2018). Enlightenment Now. Penguin. A comprehensive look at how living standards have improved across almost every measurable dimension.
• Our World in Data. "Global Extreme Poverty." ourworldindata.org. The data behind the decline in global poverty.
• Malkiel, B. (2023). A Random Walk Down Wall Street. W. W. Norton. On why participating in markets through index funds is the most effective approach for most people.